I have experienced the jhanas, if you are just starting I guess the first jhana is relevant to you, the star of the first jhana is the feeling of extasis, is a strong distinct feeling that resembles a strong orgasm, maybe is about 3 times stronger than an ordinary orgasm, check Bhante Vimalaramsis instructions on how to achieve it.

smile all the time
dhammarelax

Even if the flesh & blood in my body dry up, leaving just the skin, tendons, & bones, I will use all my human firmness, human persistence and human striving. There will be no relaxing my persistence until I am the first of my generation to attain full awakening in this lifetime. ed. AN 2.5

You should be aware that there are a considerable number of experiences that go under the name jhana. Here's a link to a web series that starts with the author's interpretation of what one should call jhana. It then proceeds to describe various different versions of jhana and compare them to each other. You could read this to get an idea of what its like to experience jhana according to various traditions. https://bhikkhucintita.wordpress.com/ho ... -variants/